G'day
How much longer can all this go on for?
Anyone who has owned an Austin-Healey for more than 5 minutes will know that
at best its cooling is very marginal. Even when new they ran hot. Trying to
equate a 50 + year old design to modern cooling systems is quite frankly,
farcical. For anyone to equate old and new, just doesn't know
Austin-Healeys.
The solution is to ensure that you have maximum coolant flowing through the
engine/radiator at the same time as there is maximum air flow through the
radiator. The job of the thermostat is to ensure that the engine warms up
quickly and in correctly maintained cooling systems doesn't drop below its
setting. Too bad overflow tanks were never fitted as original as these
ensure that the maximum water stays in the system.
How did BMC cope with the extra heat being produced during the evolution of
the six-cylinder Austin-Healey?????? Increasing the pressure of the radiator
cap. Have a look at the parts list and you will see that the part number for
the BN4 radiator is exactly the same as the BJ8. The only difference is the
radiator cap.
Saw a BT7 MKII once that had a BMC Mini radiator plumbed in between the
bottom radiator outlet and the engine. Worked well!
Hoo Roo
Patrick Quinn
Sydney, Australia
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